Valve grinder



9. T. PENMAN VALVE GRINDER March 31; 1931.

Filed Nov. 16, 1928 2 Sheets-Sheet 1 .Da w'd -T.lenman D. T. PENMAN VALVE GRINDER March 31, 1931.

Filed Nov. 16, 1928 2 Sheets-Sheet 2 Inventor David T. Penman Attarneg as signed.

p I of the valve body. to Figure 4 is a top plan .STATES PATENT OFFICE DAVID T. PENMAN, OF OOLLINGDALE, PENN SYLVANIlIA VALVE GRINDER o The present-invention relates to improvements in valve grinders, and has reference more particluai'ly to a device for grinding the seats of high pressure valves.

, One of the important objects of the present invention is to provide a valve seat grinder wherein the same includes a supporting bracket for attachment to the flangeon the top of the valve, a slotted arm being pivotalw ly mounted on the bracket and said arm carries'the valve seat grinding structure.

A further object is to provide avalve seat grinder that is electrically operated by a small motor mounted on the outer end of the w slotted vertically swinging arm, the driven shaft that extends vertically through the inner end portion of the slotted arm being capable of vertical adjustment.

A further object is to provide a valve seat 2U grinder of the above mentioned character wherein the supporting means for thedrive shaft is'adjustably associated with the slotted bar or arm so as to dispose the driving end of the shaft in operative engagement with the gear splined on the vertically disposed driven shaft regardless ofthe size of the gear. 7

A further object resides in the provision of a valve seat grinder of the above men tioned character which will at all times be positive and efficient in its operation, the same being further simple in const ruction,inexpensive, strong and durable and further well "adapted to Otherfobjectsand advantages of the invention' will become apparent during the course of the following description.

In the accompanying drawings wherein like reference characters indicate correspon ding parts throughout the same Figure 1 is a side elevation of the valve seat grinder embodying my invention showing the same in use. p V 7 Figure 2 is, a top plan view of the valve seat I grinder.

Figure 3 1s atop plan view of the bracket that is detachably secured on the upper face iew fifth-Q sl tted the purpose for whichit is de- Application filed' Novem ber 16, 1928. Serial No. 319,878.

arm forming a salient part of the present invention.

Figure 5 is a detail view of the sleeve that is clamped in the inner end of the arm in a vertical manner] y Figure 6 is a detail showing the connec tion between the grinding head and the lower end of the driven shaft.

Figure 7 is a sectional view taken approx:- imately on the line 77 of Figure 2 looking in the direction of the arrows. V

Figure 8 is a detail perspective view of the bracket per se, and

Figure 9 is a detail perspective view of the connecting member provided between the bracket and the slotted arm.

In the drawings wherein for the purpose of illustrationis shown the preferred embodiment of my invention, the numeral 1 designates an elongated flat arm or base that is formed with a longitudinally extending slot 2, the purpose of which will be presently apparent. The outer end portion of the arm 1 is offset to provide a mount 3 for a portable electric motor 4 of any conventional construction, and the motor may be secured on the offset mount 3 in any appropriate man ner. A sectional clamping head 5 is arranged at the inner end of the slotted arm or base'l within which is clamped the verticallydisposed sleeve or bushing 6, an annular groove 7 being formed in the lower portion of said sleeve to prevent. sliding .movement of the sleeve or bushing withrein any adjusted position against vertical slidable movement.

The lower end of the driven shaft 8 is formed with a reduced squaredprojection 11 that fits within a similar shaped opening formed in the central portion of thegrind.- ing disc or plate 12 as shown in Figure 6 and als ind cated in t is particu r fig re the bottom face of the grinding disk is cut out at its central portion. The grinding disk is detachably secured on the lower end of the driven shaft, and any suitable grinding compound may be applied to the bottom face of the grinding plate or disk.

Splined on the upper end portion of the driven shaft 8 is the relatively large worm wheel 13, the uppermost collar being disposed above the upper face of the worm wheel, while the bottom'faceof said "worm wheel is located above the upper end of the sleeve or bushing 6 as shown in Figure'l.

The invention further comprehends the provision of a pair 'ofob'liquely disposed arms 14 and 15, respectively,'the arm 14 being of greater length than the arm 15. Each of said last mentioned arms are formed at its lower end with a laterally disposed foot portion 16 for engagement with the upper face of the slotted base 1, and a bolt and nut connection denoted generally by the numeral 17 extends through the slot 2 and through the foot of each of the obliquely disposed arms for adjustably securing said arms with respect to the base 1. A sectional bearing'18 is arranged at the upper or outer end of eacl of the obliquely disposed arm members to 'accommodatethe elongated drive shaft 19, 'said drive shaft being operatively connected at one end with the armature shaft 20 of the motor 4 by a universal couplingdenoted generally by the numeral 21. A worm 22- is carried by the free end of the drive shaft for cooperation with the worm wheel 13 in the manner as clearly indicated in the drawings.

By sliding the obliquely disposed arms 14: and 15 along the base 1, the drive shaft 19 may be disposed at any predetermined angle so that the worm 22 can cooperate with worm wheels of different sizes, and whereby to effect the proper actuation of the driven shaft by the motor 4.

Also forming an important part of the present invention is the arcuate shaped bracket 23 that is formed with the longitudinally extending slots 24: that extend inwardly from the respective end of the brackets, 'andwhich slots terminate at the opposite sides of the vertically disposed yoke '25 formed on'the top of the intermediate portion of-the bracket 24'as more clearly disclosed in Figure 8.

This-arcl-iate shaped bracket 1s adapted to be'rigidly secured on the flanged upperface of avalve body A so that the outer edge ofthe bracket willlie flush with the outer edge of-theflangedupper portion B of the valve body and suitablebolts or the'like extend through the slots 2d and the flanged portioirB to rigidly secure the bracket in position on the-valve body. These securing bolts are indicated at 26 in Figure 3.

A block 27 is pivotally secured in the'yoke 25 vforverticalswinging movement "and extending upwardly from the top of the block 27 is the threaded stem 28 that projects through the slot 2 formed in the base 1 and a nut 29 is threaded on the upper end of this stem for engagement with the upper face of the base whereby to attach the base member to the pivoted block, the bottom face of the base or arm 1 resting on the top of the block 27. As also clearly indicated in Figure 9 the forward lower corner portion of the block is rounded so as not to interfere with the vertical swinging movement of the block and the threaded stem associated therewith.

'In'Figure 1 there is disclosed the manner in which my improved valve seat grinder is mounted on a high pressure valve for grinding the flat seat that is provided with an inclined face that is to be ground. The pivotally mounted block 2'? permits the base 1 to be swung so as to properly position the grinding disc or plate with respect to the valve seat C in order that said seat may be properlyground, and when the motor 4 is turned on, the driven shaft 8 will be rotated through the medium of the intermeshing gears in a manner readily obvious from the construction shown.

Itwill thus be seen from the foregoing description that I have provided a valve seat grinder that will save considerable time and labor in performing the grinding operation, and furthermore the valve seatwill be properly ground so as'to insure proper closing of the valve that cooperates with the ground seat.

The simplicity of my construction enables the parts to be readily and easily adjusted whenever necessary andfurthermore the parts can be assembled or disassembled.

While I have shown the preferred embodiment of my invention it is tobe understood that minor changes in the size, shape and arrangement of parts may be resorted to without departing fromthe spirit of the invention and the scope of the appended claims,

Having thus described the invention, What I claim'as new and desire. to secure by Letters Patent is 1. In a valve seat grinder, a bracket for attachment on the top of the valve body, an

ber, said means comprising a motor mounted on the other end portion of the base, a drive shaft operatively connected at one end with the armature shaft of the motor and extending longitudinally of the base, bearings arranged for longitudinal adjustment on the base for the drive shaft, and gearing inter- 7 connecting the other end of the drive shaft with the adjacent end of the driven shaft.

2. In a valve seat grinder, a bracket for attachment 011 the top of the valve body, an upstanding yoke arranged on said bracket, a member pivotally secured at its lower end in the yoke for vertical swinging movement, a substantially horizontally disposed base attached at its intermediate portion on the upper end of said member for swinging move ment therewith, a vertically disposed driven shaft supported at one end of the base and adapted to extend downwardly into the valve body, a valve seat grinding member secured on the lower end of the driven shaft for rotation therewith, means arranged on the base for rotating the shaft and said grinding member, said means comprising a motor mounted on the other end portion of the base, a drive shaft operatively connected at one end with the armature shaft of the motor and extending laterally of the base, supporting arms arranged for longitudinal adjustment on the base and connected for longitudinal adjustment to the drive shaft, and gearing interconnecting the other end of the drive shaft with the adjacent end of the driven shaft.

3. A valve seat grinder of the character described comprising a slotted base, supporting means for the base-,a grinding shaft journaled for rotation in one portion of the base and extending therethrough, a gear removably fixed on the shaft, a motor mounted on the opposite end portion of the base, a drive shaft connected, at one end,to the motor for actuation thereby, the opposite end portion of the drive shaft being operatively connected to the gear, and means for rotatably supporting the drive shaft for lateral adjustment toward and .from the grinding shaft, said means comprising a pair of arms mounted for longitudinal adjust-" ment in the slot of the base and extending upwardly and laterally therefrom, and bearings on the free ends of the arms for the reception of the drive shaft.

In testimony whereof I affix my signature.

DAVID T. PENMAN. 

